Shears



Aug. 10, 1943.

F. B. SEEBERGER SHEARS Filed Sept. 28, 1942 Patented Aug. 10, 1943UNITED STATES PATENT OFFICE g SHEARS y v p Fred B. Seeberger, Yeadon,Paf, Application September 28, 19.442, Serial N 6.459,907

Y q Y (oise- 245) l Y claims.

This invention relates to shears or soissorsfand particularly to a newandvuseful method for actuating the cutting members thereof.

The object of this invention is to provide a novel means whereby thepower to operate such shears may be supplied by the palm and fingers ofthe hand instead of the usual ngers and thumb method of operating thecutting members.

Another object of this invention is to provide a simple palm and lingerscontrolled shears that may be readily used upon a plane surface lsuch asa table, and in which shears, a single blade is actuated to perform thecutting operation.

Another object of this invention is to provide a shears having thearticulated blade operating member lever and palm member positioned ata,V

convenient angle with respect to the cutting blade, to facilitatecontrol of the shears and` prevent undue muscular fatigue commonlyexperienced in using the conventional type of shears.

Another object of this invention is to provide serrated edge blademembers having non-radially generated teeth adapted to self lappingcontact with each other to provide complementary cut-'f ting edges. i Y-Fig. 3 is a fragmentary sectional view taken on line a/-a in Fig. 2.

Reference numerals indicate the same parts in the several drawings.

In the vpractice of the invention as herein exemplied, it will be notedfrom the disclosure,

that the natural position of the hand in gripping an object may beeasily extended to the operation of the present invention with a minimumof fatigue. That extended use will not produce the usual occupationalmuscular cramp often experienced by those lcompelled to use theconventional tools provided for shearing. The principle of palm andfingers gripping 4of ashearing means may be applied without departurefrom the present invention to ordinary shears, scissors and metal snips,by substitution of suitableblades,

and the operative leverages proportioned toineet specic requirements.

VReferring to Fig. 2, the articulated blade supportingmember I, whichhas a suitable blade 5 mounted thereon, *is rigidly secured to a pivotmember 21by means of a set screw 3. '-,The pvot member!y is mounted in ablade supporting base member 4 which has a blademember 6 mountedthereon. These blade members may be attached to their respectivesupporting members by screws' or other suitable means, the type showninthe drawing being known as pinking shear blades.

' The baseA member 4 has an upright palm grip member 5 integraltherewith and preferably disposed at approximately an angle of thirtydegrees topermit easy natural position of the hand when operating thedevice upon a horizontal plane such as a table. f

Thearticulated or movable blade member I extends a predetermineddistance tothe rear-of the pivot member 2, said extensionl beingdeterminedV as to length by the leverage required to efficientlyloperate 'the cutting blades Ii. The extended portion I is provided witha suitable congurated opening 1a adapted to operatively receive Aacomplementary extension on the nger lever 9, saidA lever 9 being"pivotallyfmounted'in the base Vmember 4 and' rigidlyse'cured to thepivot member I0 by suitable means. The structure shown is a modicationof a sector gear and for the purpose of simplicity is shown as a singletooth. Y

A suitable spring or resilient member II, se-

cured to the `rear face of the nger lever 9, its outward free end I2resting againstthe inner face of the palm grip member 5 provides meansfor retracting the nger lever 9 and the articulated bladesupportingmember I to operative or open position.

While the resilient means for retracting the respective parts has beenshown interposed between the finger grip lever 9 and the palm grip- Yping means 5, an open coil spring may be placed in a suitable opening inthe under face of the lever extension 8 to exert its force against thebase member 4 to effect the return of the respective parts to operativeposition.

The pivotal axis of the articulated blade supporting member I isdisposed in the longitudinal center of the blade members 6 whichobviates the necessity-for radially cutting the teeth members andpermits easy lappingV of the blades to provide complementary cuttingedges. Further sharpening of the blade members may be accomplished bygrinding or stoning in substantially The lateral shearing alignment orfrictional contact between the blade members 6 is effected by means of aset screw i4 disposed in the base member .4 adjacent to and to the rearof the longitudinal center of the pivot member 2. The

blade member l is held immovable relation tothe screw I4 by acompression spring I5 mounted on the pivot 2 and retained in thecounterbored recess I6. recessedl male threaded bearing member l'screwed into the base member 4 provides supporting means for the outerendof the, pivot 2 and compresses the'spring i5 to maintainYoperative'alignment between the blade mem-V bers E.

The disposition of theset screw lit tothe rearl Vof the pivot 2increases theI tendency' toward tending the liand returns thearticulated. blade.

member, l toits operative er opent-position..

' Certain instances this may bei the nreerred: term of. retractiveeontroli'fer specific. uses Y- A Y Among. the.- advantages. tof beobtained from a rigid blade supporting base member in which thearticulated blade may be centrolledbyV the palmand, iingers. is theentire absence et. undulating Y the same manner as is done withconventional scissors or shears.

porting base member having an angular gripping means integral therewith,an articulated blade supporting member pivotaliy disposed in the basemember, a lever member pivotally disposed'in the base member and adaptedto operatively engage the articulated blade supporting member. 2. Ashearing means according to claim l, and resilient means for retractingthe blade and lever membersxto operative position.

3. A shearing` means comprising; a blade supporting base'member having avertically disposed Y gripping means integral therewith, an articulatedblade supporting member pivotally suspended in the base member, a levermember pivotally disposed in thebase member and adapted to operativelyengage the articulated blade supporting member; resilientlmeans forretraoting the blade and lever members to operative position, and anadljustingmeans mounted in the base member to frictionally engage4 thearticulated blade, member for regulatiuigl the lateral, rictienalContact, between the respective blade'members, Y

4t. A, shearing; means comprising, a. blade supparting hase memberhaving averticall-ydisposed angular gripping. means integral therewith,an articulated blade supporting, member L iivotallyr disposedA in the.base. mem-ben a lever member piv-A otal-ly disposed in the base memberand adapted to. operatively engage, the articulatedblade memben,resilient. means mounted on the articuiated blade. pivot member forholding. the said mem-ber in operatiue4 alignment, resilientmeansinterposed between .thel lever member and the gripping motion:experienced using" the conventionalshears or' scissors. Renewing; a.marked, onu-rsev for cutting becomes a comparativelysi-irng1-le.mateter. The shears may beslidalorrgiusing thehand to.: guide the material.-tobe out, and equal; facility isexperienced when using the devicetaftrim or Y eral frictional out material thattis not: suitable forlay-ing `ont flat when cutting` samer. 'iheseV and oiilfier;ad?Vvantages wil-1f be readily apparent to.' those, skilled inf.thea1.t..v I

What isrclaimedas,- the invention` desired; tefl VYbe;securedbyLettersiPatentf, is;

1r. A shearing means oemprisngra blade; sup- Y means` for retractinethe, articulated blade: membertooperatve position, adjusfingmeans meuntVed the base, member to fractional-ly eng-.agb the artcu-lated blade,member fer, regulating the; lat'- V.lignr-nent. between therespectiveblade members. Y

5: A shearingmeans according to Claim 4. and al removable bearing member`rnoi'irited in thebase member for supporting; theouter end er theartcu-lated.- blade,l pivot, said bearing; being; adapte ed to compressthe resilient member mcd-1113.66.; Qn the articulated blaadepivet te;held. said. lfzlade.y in operative-alignment.. 1 Y Y I

